Patents by Inventor Gerald A. Brimmer

Gerald A. Brimmer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • RF power amplifier with dynamic impedance matching through discrete presets and/or a variable power supply
    Patent number: 10148231
    Abstract: An apparatus includes an RF power amplifier with a controller and an impedance matching network. The RF power amplifier is configured to drive a load in electrical communication with the RF power amplifier. The impedance matching network is located electrically between the RF power amplifier and the load. The impedance matching network is configured to match an output impedance of the RF power amplifier and an impedance of the load. The impedance matching network includes a set of fixed value impedance matching circuits configured to provide different discrete values. The RF amplifier includes a variable DC power supply powering RF transistors to result in a variable output impedance for the amplifier. The controller selects an impedance matching circuit of the capacitor presets and/or the right setting for the variable DC supply that result in minimum reflected power to match the output impedance of the amplifier to the output load impedance.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: December 4, 2018
    Assignee: Analogic Corporation
    Inventors: Ahmed A. Hussein, Gerald A. Brimmer, Robert G. Haefner, Jr., Matthew Hanlon
  • RF Power Amplifier with Dynamic Impedance Matching through Discrete Presets and/or a Variable Power Supply
    Publication number: 20170359034
    Abstract: An apparatus includes an RF power amplifier with a controller and an impedance matching network. The RF power amplifier is configured to drive a load in electrical communication with the RF power amplifier. The impedance matching network is located electrically between the RF power amplifier and the load. The impedance matching network is configured to match an output impedance of the RF power amplifier and an impedance of the load. The impedance matching network includes a set of fixed value impedance matching circuits configured to provide different discrete values. The RF amplifier includes a variable DC power supply powering RF transistors to result in a variable output impedance for the amplifier. The controller selects an impedance matching circuit of the capacitor presets and/or the right setting for the variable DC supply that result in minimum reflected power to match the output impedance of the amplifier to the output load impedance.
    Type: Application
    Filed: June 14, 2016
    Publication date: December 14, 2017
    Inventors: AHMED A. HUSSEIN, GERALD A. BRIMMER, ROBERT G. HAEFNER, JR., MATTHEW HANLON
  • NMR/MRI pulse amplifier
    Patent number: 5374895
    Abstract: An improved Nuclear Magnetic Resonance (NMR)/Magnetic Resonance Imaging (MRI) Pulse Amplifier uses fast acting Radio Frequency (RF) switches with a fixed or programmable attenuator to achieve fast blanking speed, low blanked noise and a low power mode, previously unavailable with existing amplifiers.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: December 20, 1994
    Assignee: Spectrian, Inc.
    Inventors: Rowland N. Lee, Gerald A. Brimmer